Underapproximation is a antonym of overapproximation.
As nouns the difference between overapproximation and underapproximation
is that overapproximation is an approximation that is higher than the true value while underapproximation is an approximation that is lower than the true value.
overapproximation
English
Alternative forms
*over-approximation
Noun
(
en noun)
An approximation that is higher than the true value.
Antonyms
* underapproximation underapproximation
English
Alternative forms
*under-approximation
Noun
(
en noun)
An approximation that is lower than the true value.
Antonyms
* overapproximation